CN102839236A - Dual-purpose modification process for native breed sheepskin leather - Google Patents
Dual-purpose modification process for native breed sheepskin leather Download PDFInfo
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Abstract
The invention discloses a dual-purpose modification process for native breed sheepskin leather. The process sequentially comprises the following steps of processing native breed sheepskin semi-finished products: (1) classifying skin; (2) returning water; (3) soaking; (4) softening; (5) pickling; (6) performing chromium aluminum tanning; (7) performing tanning post-processing; (8) performing chrome retanning; (9) performing chrome retanning before dyeing; and (10) dyeing. According to the dual purpose modification process, commercially available native breed semi-finished skin (namely white skin) is processed, and the native breed semi-finished skin is tanned by increasing aldehyde aluminum tanning particularly, so that the extensibility of the native breed sheepskin can be effectively improved, the problem of dyeing defects is solved, and the uniformity in the post dyeing is ensured. The dual purpose modification process is matched with other steps and appropriate additives, and each additive is added according to reasonable additive amount, so that the final products have good handfeeling, high tearing resistance and high fullness, and the quality of the native breed sheepskin leather is greatly improved.
Description
Technical field
The present invention relates to a kind of production technique of fur coat leather goods, be specifically related to soil species sheep work in-process fur and remove from office dual-purpose reform technology.
Background technology
The soil species sheepskin promptly can be used for cutting out the sewing various kinds clothes after multiple working procedure is handled.It is not good enough that the soil species sheepskin of being sold in the market exists tearing force intensity, causes the firm inadequately shortcoming of finished product, and its fullness ratio is not good enough simultaneously, influenced the quality of the prepared clothes of soil species sheepskin.In order to increase the clothes quality, be necessary the technology of at present commercially available soil species sheepskin is improved processing.
Summary of the invention
Technical problem to be solved by this invention is, a kind of soil species sheepskin Qiu Ge is provided dual-purpose reform technology, and commercially available soil species sheep work in-process skin is reequiped, and improves quality.
Technical scheme of the present invention: the dual-purpose reform technology of soil species sheepskin Qiu Ge that the present invention set forth comprises successively soil species sheepskin work in-process is carried out following treatment step:
(1), hide is classified;
(2), backwater;
(3), immersion;
(4), softening;
(5), pickling;
(6), chromium aluminum tanning;
(7), tanning aftertreatment;
(8), chromium retanning;
(9), chromium retanning before the dyeing;
(10), dyeing.
Further, this technology comprises successively soil species sheepskin work in-process is carried out following treatment step:
(1), according to thickness, fiber tightness hide is classified;
(2), backwater: skin is placed 34 ℃ of water, with salt, wetting agent, softening agent, oxalic acid, soaked 16-18 hour, drain, dry, with 35 ℃ of washings 60 minutes, control water with 25 ℃ of washings 5 minutes, was controlled water;
(3), immersion: skin is immersed in 30 ℃ of water,, spend the night, cleaned 15 minutes control water with 25 ℃ of water to next day with salt, immersion auxiliary agent, grease-removing agent, soaking enzyme, softening agent;
(4), softening: as skin to be immersed in 30 ℃ of water, with salt, help soft dose, fatting agent, tensio-active agent, wetting agent, formic acid, acidicenzym, spend the night to next day;
(5), pickling: skin is immersed in 30 ℃ of water, adds formic acid, spend the night, take horse next day and leave standstill, after night to next day;
(6), chromium aluminum tanning: skin is immersed in 35 ℃ of water, with salt, wetting agent, tensio-active agent, fatting agent, tschermigite, auxiliary tanning agent, contain chrome tanning agent, spend the night; Add sodium bicarbonate next day, transfer PH to 3.6-4.0, heat to 38-40 ℃; After 2 hours; Take skin and spend the night to next day, hold over night again, skin dries in the air next day;
(7), tanning aftertreatment: skin is got damp again successively, and rotary drum gets rid of soft, and shovel leaves, and the mill skin is done degreasing, and moisture regain is got rid of soft, the shovel skin;
(8), the chromium retanning: skin is immersed in 35 ℃ of water, with salt, return humectant, grease-removing agent and soda ash and return wet treatment, control water drying after 120 minutes, 28 ℃ of clear water are washed skin,
Skin is immersed in 35 ℃ of water; With salt, carbon ammonium, stuffing stablizer, fatting agent, synthetic tanning agent, protein filling, softening agent, formic acid, aldehyde tanning agent, aluminum tanning agent, chrome tanning agent, chromium fixing agent, sodium formiate, sodium bicarbonate, mould inhibitor, carry out tanning and handle, spend the night; Control water next day and go out skin
Skin is immersed in 35 ℃ of water, add sodium formiate, sodium bicarbonate, grease-removing agent, regulate pH value 6.0 neutralizations, go out skin after 90 minutes, take the horse skin that dries in the air, dry the back moisture regain, rotary drum gets rid of soft, shovel skin, mill skin;
(9), chromium retanning before the dyeing: skin is immersed in 35 ℃ of water, adds wetting agent, fatting agent, formic acid, transfer pH value 3.6, add again and contain chrome tanning agent, chrome tanning agent, sodium bicarbonate, transfer pH value 3.8-3.9 to spend the night, control water next day,
Skin is immersed in 35 ℃ of water, add sodium formiate, sodium bicarbonate, grease-removing agent, regulate pH value 6.0 and neutralize, go out skin and dry;
(10), dyeing:
Dye wool dyeing, skin is placed 60-68 ℃ of water, with salt, levelling agent, ammoniacal liquor, regulate pH value 7-8, carried out neutralizing treatment 40 minutes, add dyestuff, formic acid then, regulate pH value 3.8, dyeing is washed skin with 25 ℃ of clear water after accomplishing, and goes out skin, takes horse, gets into to dye plate dyeing;
Dye plate dyeing, elder generation adds sodium formiate, sodium bicarbonate with in 35 ℃ of water of skin immersion, and with 90 minutes, control water was washed drying among the adjusting pH value 5.8-6.0; Then skin is immersed in 25 ℃ of water, add levelling agent, dyestuff, fatting agent, mould inhibitor, formic acid, regulate pH value 4.0, time 4-5 hour, control water went out skin, immerses in 25 ℃ of water again; Add formic acid, regulate pH value 3.6-3.8, add grease-removing agent, carry out pickling, clean up back control water; Dry, the skin that dries in the air dries the back moisture regain, and rotary drum gets rid of soft, the skin that stretches tight arrangement.
Preferably, dye the used formic acid of wool dyeing in the said step (10) and add at twice, 15-20 minute at interval.
Further, the material addition is following in each step:
In the step (2), salt 60g/L, wetting agent 0.5 g/L, softening agent 0.5 g/L, oxalic acid 0.5 g/L;
In the step (3), salt 20 g/L, immersion auxiliary agent 0.5 g/L, grease-removing agent 0.5 g/L, soaking enzyme 1 g/L, softening agent 0.5 g/L;
In the step (4), salt 30 g/L, help soft dose 0.5 g/L, fatting agent 0.5 g/L, tensio-active agent 0.5 g/L, wetting agent 0.5 g/L, formic acid 1 g/L, acidicenzym 4 g/L;
In the step (5), formic acid 2 g/L;
In the step (6), salt 50 g/L, wetting agent 1 g/L, tensio-active agent 1 g/L, fatting agent 2 g/L, tschermigite 16 g/L, auxiliary tanning agent 1 g/L;
In the step (8), return wet: salt 40 g/L, time humectant 0.5 g/L, grease-removing agent 0.5 g/L and soda ash 0.5 g/L,
Tanning: salt 40 g/L, carbon ammonium 0.5 g/L, stuffing stablizer 0.3 g/L, fatting agent 6 g/L, synthetic tanning agent and protein filling are confirmed consumption according to the hide tightness; Softening agent 2 g/L, formic acid 2.5 g/L, aldehyde tanning agent 2 g/L, aluminum tanning agent 3 g/L, chrome tanning agent 15 g/L, chromium fixing agent 1.5 g/L, sodium formiate 1 g/L, sodium bicarbonate 3 g/L, mould inhibitor 0.2 g/L
Neutralization: sodium formiate 2 g/L, sodium bicarbonate 1.5 g/L, grease-removing agent 0.3 g/L;
In the step (9), chromium retanning before the dyeing: wetting agent 0.3 g/L, fatting agent 0.5 g/L, formic acid 0.3 g/L, contain chrome tanning agent 4 g/L, chrome tanning agent 2 g/L, sodium bicarbonate 0.8 g/L,
Neutralization: sodium formiate 2 g/L, sodium bicarbonate 1.5 g/L, grease-removing agent 0.3 g/L;
In the step (10),
Dye wool dyeing, salt 10 g/L, levelling agent 0.5-0.6 g/L, ammoniacal liquor 1 g/L, dyestuff is confirmed consumption, formic acid 1 g/L according to different colours,
Dye plate dyeing, in the time sodium formiate 2 g/L, sodium bicarbonate 1 g/L, add levelling agent 0.5 g/L then, dyestuff is confirmed consumption, fatting agent 6 g/L, mould inhibitor 0.1 g/L, formic acid 1 g/L according to color, formic acid 0.3 g/L during pickling, grease-removing agent 0.5 g/L.
The present invention with commercially available soil species work in-process skin (being white skin) soften, pickling handles, and makes hide have pliability, through processing such as chromium aluminum tanning, mill skins, makes the dermatotome matte fine and smooth again; Improve the shrinkage temperature of hide, adapt to the resisting temperature of dying hair, therefore, the present invention not only can effectively improve the extensibility of soil species sheepskin; Solve look flower problem, guarantee the later stage even dyeing, other steps of arranging in pairs or groups; And suitable additive, every kind of additive adopts rational addition again, and final products obtained therefrom feel is improved; Application of force intensity increases, and fullness ratio is fabulous, has improved the quality of soil species sheepskin greatly.
Further set forth technical scheme of the present invention in detail through specific embodiment below.
Embodiment
Embodiments of the invention 1: the present invention adopts commercially available soil species sheep work in-process skin, and promptly white skin is a raw material, reequips through following taw dyeing successively:
(1), according to thickness, fiber tightness hide is classified;
(2), backwater: will divide good type hide to place 34 ℃ of water, and, soak 16-18 hour with salt 60g/L, wetting agent 0.5 g/L, softening agent 0.5 g/L, oxalic acid 0.5 g/L; Drain then, dry again, with 35 ℃ of washings 60 minutes; Control water, with 25 ℃ of washings 5 minutes, control water;
(3), immersion: skin is immersed in 30 ℃ of water,, spend the night, go out skin, cleaned 15 minutes control water with 25 ℃ of water to next day with salt, immersion auxiliary agent, grease-removing agent, soaking enzyme, softening agent;
In the step (3), salt 20 g/L, immersion auxiliary agent 0.5 g/L, grease-removing agent 0.5 g/L, soaking enzyme 1 g/L, softening agent 0.5 g/L;
(4), softening: as skin to be immersed in 34 ℃ of water, with salt 30 g/L, help soft dose 0.5 g/L, fatting agent 0.5 g/L, tensio-active agent 0.5 g/L, wetting agent 0.5 g/L, formic acid 1 g/L, acidicenzym 4 g/L, spend the night to next day;
(5), pickling: skin is immersed in 30 ℃ of water, adds formic acid 2 g/L, spend the night, take horse next day and leave standstill, after night to next day;
(6), chromium aluminum tanning: skin is immersed in 35 ℃ of water, with salt 50 g/L, wetting agent 1 g/L, tensio-active agent 1 g/L, fatting agent 2 g/L, tschermigite 16 g/L, auxiliary tanning agent 1 g/L, contain chrome tanning agent 4 g/L (containing chrome tanning agent is fur coat leather goods tanning agentss commonly used, and mill skin, the painted leather surface vividness of matte etc. are all had the improvement effect); Spend the night; Add sodium bicarbonate next day, the adjustment pH value is heated to 38-40 ℃ to 3.6-4.0; After 2 hours, take skin and spend the night to next day;
(7), tanning aftertreatment: skin is got damp again successively, and rotary drum gets rid of soft, and shovel leaves, and the mill skin is done degreasing, and moisture regain is got rid of soft, the shovel skin;
(8), chromium retanning: hide is classified according to thickness, fiber tightness; Then skin is immersed in 35 ℃ of water; Return wet treatment with salt 40 g/L, time humectant 0.5 g/L, grease-removing agent 0.5 g/L and soda ash 0.5 g/L, control water dries after 120 minutes, washes skin with 28 ℃ of clear water.Again; Skin is immersed in 35 ℃ of water; Add 40 g/L, carbon ammonium 0.5 g/L, stuffing stablizer 0.3 g/L, fatting agent 6 g/L, synthetic tanning agent and protein filling and confirm consumption according to the hide tightness, softening agent 2 g/L, formic acid 2.5 g/L, aldehyde tanning agent 2 g/L, aluminum tanning agent 3 g/L, chrome tanning agent 15 g/L, chromium fixing agent 1.5 g/L, sodium formiate 1 g/L, sodium bicarbonate 3 g/L, mould inhibitor 0.2 g/L carry out tanning and handle; Spend the night, control water next day and go out skin.At last, skin is immersed in 35 ℃ of water, add sodium formiate 2 g/L, sodium bicarbonate 1.5 g/L, grease-removing agent 0.3 g/L, regulate pH value 6.0 and neutralize, go out skin after 90 minutes, take the horse skin that dries in the air, dry the back moisture regain, rotary drum gets rid of soft, shovel skin, mill skin;
(9), chromium retanning before the dyeing: skin is immersed in 35 ℃ of water, add wetting agent 0.3 g/L, fatting agent 0.5 g/L, formic acid 0.3 g/L, transfer pH value 3.6; Add again and contain chrome tanning agent 4 g/L, chrome tanning agent 2 g/L, sodium bicarbonate 0.8 g/L; Transfer pH value 3.8-3.9 to spend the night, control water next day
Skin is immersed in 35 ℃ of water, add sodium formiate 2 g/L, sodium bicarbonate 1.5 g/L, grease-removing agent 0.3 g/L and regulate pH value 6.0 and neutralize, go out skin and dry;
(10), dyeing, comprise and dye wool dyeing and dye plate and dye:
Dye wool dyeing, skin is placed 60-68 ℃ of water, with salt 10 g/L, levelling agent 0.5-0.6 g/L, ammoniacal liquor 1 g/L; Regulate pH value 7-8, carried out neutralizing treatment 40 minutes, confirm amount, formic acid 1 g/L of the dyestuff of interpolation then according to different colours; Formic acid adds at twice, 15-20 minute at interval, regulates pH value 3.8; Dyeing is washed skin with 25 ℃ of clear water after accomplishing, and goes out skin, takes horse;
Dye plate dyeing, earlier skin is immersed in 35 ℃ of water, add sodium formiate 2 g/L, sodium bicarbonate 1 g/L, regulate pH value 5.8-6.0 neutralization, control water; Washing dries, and then skin is immersed in 25 ℃ of water, adding assistant 0.5 g/L, confirms dye dosage, fatting agent 6 g/L, mould inhibitor 0.1 g/L, formic acid 1 g/L according to color, regulates pH value 4.0, time 4-5 hour; Control water goes out skin, immerses in 25 ℃ of water again, adds formic acid 0.3 g/L, regulates pH value 3.6-3.8; Add grease-removing agent 0.5 g/L, carry out pickling, clean up back control water, dry; The skin that dries in the air, moisture regain, rotary drum gets rid of soft, the skin that stretches tight arrangement.
Because this work in-process skin was aldehyde aluminum tanning system originally, the dual-purpose skin of Qiu Ge be repacked into and softening, pickling must be passed through, hide just has pliability; Again through grinding skin behind the chromium aluminum tanning; Can make the dermatotome matte fine and smooth, the chromium aluminum tanning can improve the shrinkage temperature of hide, adapts to the resisting temperature of dying hair).
The used salt of production process generally adopts Industrial Salt to get final product, and also can adopt salt, and staple is sodium-chlor.All material additions are confirmed according to the amount of soaked in water, the weight that promptly every premium on currency added, and addition can suitably be adjusted according to the actual requirements.
Claims (4)
1. dual-purpose reform technology of soil species sheepskin Qiu Ge, it is characterized in that this technology comprises successively carries out following treatment step to soil species sheepskin work in-process:
(1), hide is classified;
(2), backwater;
(3), immersion;
(4), softening;
(5), pickling;
(6), chromium aluminum tanning;
(7), tanning aftertreatment;
(8), chromium retanning;
(9), chromium retanning before the dyeing;
(10), dyeing.
2. the dual-purpose reform technology of soil species sheepskin Qiu Ge according to claim 1, it is characterized in that this technology comprises successively carries out following treatment step to soil species sheepskin work in-process:
(1), according to thickness, fiber tightness hide is classified;
(2), backwater: skin is placed 34 ℃ of water, with salt, wetting agent, softening agent, oxalic acid, soaked 16-18 hour, drain, dry, with 35 ℃ of washings 60 minutes, control water with 25 ℃ of washings 5 minutes, was controlled water;
(3), immersion: skin is immersed in 30 ℃ of water,, spend the night, go out skin, cleaned 15 minutes control water with 25 ℃ of water to next day with salt, immersion auxiliary agent, grease-removing agent, soaking enzyme, softening agent;
(4), softening: as skin to be immersed in 30 ℃ of water,, spend the night to next day with salt, fatting agent, tensio-active agent, wetting agent, formic acid, acidicenzym;
(5), pickling: skin is immersed in 30 ℃ of water, adds formic acid, spend the night, take horse next day and leave standstill, after night to next day;
(6), chromium aluminum tanning: skin is immersed in 35 ℃ of water,, contain chrome tanning agent with salt, wetting agent, tensio-active agent, fatting agent, tschermigite, auxiliary tanning agent; Spend the night, add sodium bicarbonate next day, adjustment PH to 3.6-4.0; Heat to 38-40 ℃, after 2 hours, take skin and spend the night to next day; Hold over night again, skin dries in the air next day;
(7), tanning aftertreatment: skin is got damp again successively, and rotary drum gets rid of soft, and shovel leaves, and the mill skin is done degreasing, and moisture regain is got rid of soft, the shovel skin;
(8), the chromium retanning: skin is immersed in 35 ℃ of water, with salt, return humectant, grease-removing agent and soda ash and return wet treatment, control water drying after 120 minutes, 28 ℃ of clear water are washed skin,
Skin is immersed in 35 ℃ of water; With salt, carbon ammonium, stuffing stablizer, fatting agent, synthetic tanning agent, protein filling, softening agent, formic acid, aldehyde tanning agent, aluminum tanning agent, chrome tanning agent, chromium fixing agent, sodium formiate, sodium bicarbonate, mould inhibitor, carry out tanning and handle, spend the night; Control water next day and go out skin
Skin is immersed in 35 ℃ of water, add sodium formiate, sodium bicarbonate, grease-removing agent, regulate pH value 6.0 neutralizations, go out skin after 90 minutes, take the horse skin that dries in the air, dry the back moisture regain, rotary drum gets rid of soft, shovel skin, mill skin;
(9), chromium retanning before the dyeing: skin is immersed in 35 ℃ of water, adds wetting agent, fatting agent, formic acid, transfer pH value 3.6, add again and contain chrome tanning agent, chrome tanning agent, sodium bicarbonate, transfer pH value 3.8-3.9 to spend the night, control water next day,
Skin is immersed in 35 ℃ of water, add sodium formiate, sodium bicarbonate, grease-removing agent, regulate pH value 6.0 and neutralize, go out skin and dry;
(10), dyeing:
Dye wool dyeing, skin is placed 60-68 ℃ of water, with salt, levelling agent, ammoniacal liquor, regulate pH value 7-8, carried out neutralizing treatment 40 minutes, add dyestuff, formic acid then, regulate pH value 3.8, dyeing is washed skin with 25 ℃ of clear water after accomplishing, and goes out skin, takes horse, gets into to dye plate dyeing;
Dye plate dyeing, elder generation adds sodium formiate, sodium bicarbonate with in 35 ℃ of water of skin immersion, and with 90 minutes, control water was washed drying among the adjusting pH value 5.8-6.0; Then skin is immersed in 25 ℃ of water, adding assistant, dyestuff, fatting agent, mould inhibitor, formic acid are regulated pH value 4.0, and time 4-5 hour, control water went out skin, immerses in 25 ℃ of water again; Add formic acid, regulate pH value 3.6-3.8, add grease-removing agent, carry out pickling, clean up back control water; Dry, the skin that dries in the air dries the back moisture regain, and rotary drum gets rid of soft, the skin that stretches tight arrangement.
3. the dual-purpose reform technology of soil species sheepskin Qiu Ge according to claim 2 is characterized in that dying in the said step (10) the used formic acid of wool dyeing and adds at twice, 15-20 minute at interval.
4. the dual-purpose reform technology of soil species sheepskin Qiu Ge according to claim 2 is characterized in that the material addition is following in each step:
In the step (2), salt 60g/L, wetting agent 0.5 g/L, softening agent 0.5 g/L, oxalic acid 0.5g/L;
In the step (3), salt 20 g/L, immersion auxiliary agent 0.5 g/L, grease-removing agent 0.5 g/L, soaking enzyme 1 g/L, softening agent 0.5 g/L;
In the step (4), salt 30 g/L, help soft dose 0.5 g/L, fatting agent 0.5 g/L, tensio-active agent 0.5 g/L, wetting agent 0.5 g/L, formic acid 1 g/L, acidicenzym 4 g/L;
In the step (5), formic acid 2 g/L;
In the step (6), salt 50g/L, wetting agent 1 g/L, tensio-active agent 1 g/L, fatting agent 2 g/L, tschermigite 16 g/L, auxiliary tanning agent 1 g/L, contain chrome tanning agent 4g/L;
In the step (8), return wet: salt 40 g/L, time humectant 0.5 g/L, grease-removing agent 0.5 g/L and soda ash 0.5 g/L,
Tanning: salt 40 g/L, carbon ammonium 0.5 g/L, stuffing stablizer 0.3 g/L, fatting agent 6 g/L, synthetic tanning agent and protein filling are confirmed consumption according to the hide tightness; Softening agent 2 g/L, formic acid 2.5 g/L, aldehyde tanning agent 2 g/L, aluminum tanning agent 3 g/L, chrome tanning agent 15 g/L, chromium fixing agent 1.5 g/L, sodium formiate 1 g/L, sodium bicarbonate 3 g/L, mould inhibitor 0.2 g/L
Neutralization: sodium formiate 2 g/L, sodium bicarbonate 1.5 g/L, grease-removing agent 0.3 g/L;
In the step (9), chromium retanning before the dyeing: wetting agent 0.3 g/L, fatting agent 0.5 g/L, formic acid 0.3 g/L, contain chrome tanning agent 4 g/L, chrome tanning agent 2 g/L, sodium bicarbonate 0.8 g/L,
Neutralization: sodium formiate 2 g/L, sodium bicarbonate 1.5 g/L, grease-removing agent 0.3 g/L;
In the step (10),
Dye wool dyeing, salt 10 g/L, levelling agent 0.5-0.6 g/L, ammoniacal liquor 1 g/L, dyestuff is confirmed consumption, formic acid 1 g/L according to different colours,
Dye plate dyeing, in the time sodium formiate 2 g/L, sodium bicarbonate 1 g/L, add levelling agent 0.5 g/L then, dyestuff is confirmed consumption, fatting agent 6 g/L, mould inhibitor 0.1 g/L, formic acid 1 g/L according to color, formic acid 0.3 g/L during pickling, grease-removing agent 0.5 g/L.
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| CN114540557A (en) * | 2021-12-14 | 2022-05-27 | 浙江中辉裘革科技有限公司 | Production process of sheepskin-like amber fur leather |
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| CN104313199A (en) * | 2014-10-28 | 2015-01-28 | 北京泛博化学股份有限公司 | Method of preparing sheepskin clothing face garment leather with small liquor ratio |
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| CN108130755A (en) * | 2018-01-25 | 2018-06-08 | 焦作隆丰皮草企业有限公司 | The dyeing that a kind of coloring agent and hair for hair leather is removed from office |
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| CN108424983A (en) * | 2018-03-19 | 2018-08-21 | 江西隆华皮革有限公司 | Sheepskin thickening method |
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| CN109385916A (en) * | 2018-10-17 | 2019-02-26 | 焦作隆丰皮草企业有限公司 | A kind of low liquor ratio colouring method of sheep shearing |
| CN110004254A (en) * | 2018-12-10 | 2019-07-12 | 中国水产科学研究院长江水产研究所 | The soft correction processing method of the sturgeon skin of acipenser dabryanus and mandarin sturgeon |
| CN110004254B (en) * | 2018-12-10 | 2021-07-23 | 中国水产科学研究院长江水产研究所 | Method for processing soft shoe upper leather of sturgeon skin of Yangtze river sturgeon and Chinese sturgeon |
| CN109609707A (en) * | 2019-01-31 | 2019-04-12 | 漳州香洲皮革有限公司 | The preparation method of reflective leather |
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